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TY - CONF AU - Kuriki, M. AU - Chen, S. AU - Kashiwagi, S. AU - Kato, R. AU - Ohmi, K. AU - Seimiya, Y. AU - Urakawa, J. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - FEL Enhancement by Microbuch Structure Made with Phase-Space Rotation J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - FEL is one of the ideal radiation source over the wide range of wavelength region with a high brightness and a high coherence. Many methods to improve FEL gain has been proposed by introducing an active modulation on the bunch charge distribution. The transverse-longitudinal phase-space rotation is one of the promising method to realize the density modulation as the micro-bunch structure. Initially, a beam density modulation in the transverse direction made by a mechanical slit, is properly transformed into the density modulation in the longitudinal direction by the phase-space rotation. The micro-bunch structure made with this method has a large tunability by changing the slit geometry, the beam line design, and the beam dynamics tuning. For FEL, enegy chirp made by the emittance exchange and chromaticity made by this chirp should be properly corrected. Simulation results and possible applications are discussed. PB - JACoW CP - Geneva, Switzerland SP - 1570 EP - 1572 KW - FEL KW - laser KW - simulation KW - cavity KW - bunching DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-TUPWA063 UR - http://jacow.org/ipac2015/papers/tupwa063.pdf ER -